ISP check 23 maart 2021 Technologie Productsnelheid (Mbps) VDSL 40 Mbps / 5 Mbps VDSL 20 Mbps / 2 Mbps ADSL 14 Mbps / 0,992 Mbps ADSL 14 Mbps / 0,97 Mbps, ADSL VDSL 20 Mbps / 2 Mbps, VVDSL Post navigation ISP checkISP check